Olaya I. Brewer Gutierrez, MD

Medicare activity in 2024

Official CMS public-use data for Olaya I. Brewer Gutierrez, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)157 services
2. Study of esophagus to assess movement (91010)75 services
3. Monitoring and recording of esophageal function through nasal tube with electrode (91037)68 services
4. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)64 services
5. Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43242)46 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High cholesterol75%
• High blood pressure70%
• Arthritis49%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)26%
• Ischemic heart disease25%
• Diabetes24%

Hospitals where Olaya I. Brewer Gutierrez works

Medicare's Facility Affiliation Data lists Olaya I. Brewer Gutierrez at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Johns Hopkins Bayview Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210029
• Sibley Memorial HospitalWashington, DC · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 090005

Practice locations

Addresses where Olaya I. Brewer Gutierrez is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 9; the Medicare profile lists all.

• 4940 Eastern AveBaltimore, MD 21224
• 5215 Loughboro Rd NW, Suite 330Washington, DC 20016 (202) 537‑4277
• 5225 Loughboro Rd NW, Suite 330Washington, DC 20016 (202) 537‑4000
• 5255 Loughboro Rd NWWashington, DC 20016 (202) 537‑4000
• 5255 Loughboro Road NW, Sibley Memorial HospitalWashington, DC 20016 (202) 660‑6500

Group practices

Medicare enrollment lists Olaya I. Brewer Gutierrez as a member of these groups (CMS data updated October 2, 2026).

• Johns Hopkins University2,909 clinicians in the group
• Johns Hopkins University713 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Maryland →

Other gastroenterologists in Baltimore

Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.

• Wikrom Karnsakul, MD
• Mian Khalid, MD
• Ahmad Nawaz, MD
• Abdulhameed Al-Sabban, MD
• Robert S. Bulat, MD
• Mohammad I. Khan, MD
• Ali Alsayed Hussain, MD
• Bedoor Alabbas, MD

All gastroenterologists in Baltimore →

Other clinicians in Johns Hopkins University

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Michael A. Schweitzer, MD
• Alexander Baras, MD
• Judith Goldstein, OD
• Ciera Mangone, MD
• Jaroslaw J. Jedrych, MD
• Norris Nolan, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians